Optical transfer is clearer when several fraction products are visible. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Two half stages leave one quarter

Source 24 through transfers 1/2 and 1/2 leaves output 6.

241212=624\cdot\frac{1}{2}\cdot\frac{1}{2}=6
Optical transferExact stage transfers set the output signal.sourcestagestage24126

Mixed fractions can return an integer output

Source 24 through transfers 3/4 and 2/3 leaves output 12.

243423=1224\cdot\frac{3}{4}\cdot\frac{2}{3}=12
Optical transferExact stage transfers set the output signal.sourcestagestage241812

Factor cancellation still comes from multiplication

Source 30 through transfers 5/6 and 3/5 leaves output 15.

305635=1530\cdot\frac{5}{6}\cdot\frac{3}{5}=15
Optical transferExact stage transfers set the output signal.sourcestagestage302515